Plotly Express is a terse, consistent, high-level wrapper around Plotly.py for rapid data exploration and figure generation.
Documentation and examples can be found at https://plotly.express/
Plotly Express is compatible with Python 3+ and Python 2.7.
Just running pip install plotly_express in your terminal should do it!
You'll have to install from the plotly channel with conda install -c plotly plotly_express
Using Plotly Express in JupyterLab requires the plotly-extension to be installed by running jupyter labextension install @jupyterlab/plotly-extension.
Plotly Express depends on very recent versions of plotly and it's sometimes possible to get into a state where you have multiple versions of plotly installed (e.g. once with pip and once with conda) so be sure to check your version by running plotly.__version__ in the same environment that you're having issues with plotly_express.